Telstra's deal with NBN Co. guarantees a $9billion after-tax cash flow over the next three to four decades. Photo: Michele Mossop

Corrimal in NSW's Illawarra region; Ascot in north-east Brisbane; the Melbourne suburbs of Footscray, Karingal and Keysborough; Bellerive and Claremont in Hobart; and South Launceston have been added to the plan.

It also shows 758,100 premises will have access to the NBN by 2013, an increase of 191,300 from the initial schedule released in October.

Chief executive Mike Quigley told a senate committee hearing on Tuesday NBN Co was connecting more premises in areas where the rollout had already occurred.

He said about 5500 premises have been connected to the NBN.

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NBN Co will soon release its three-year rollout plan, which will include more locations for the network.

Under the $35.9 billion project, fibre-optic cable delivering high-speed broadband services will be rolled out to 93 per cent of Australia's 13 million homes, schools and businesses by 2021. NBN Co will also pay Telstra about $14 billion to use its infrastructure and transfer copper-line customers to NBN Co.

Fixed 4G wireless technology will provide high-speed internet to four per cent of premises, and the remaining three per cent will be supplied by two satellites to areas outside the reach of the fibre cable network. The satellite services are already available to remote premises on an interim service. The copper telephone line will remain connected to households served by wireless and internet services.

NBN Co will own and maintain the network and sell services directly to companies, which will then provide retail broadband services. The full roll out is expected to take 10 years.